You must copy all the bottom 3 files that appear - the bottom file needs to be cut and pasted into the folder on your pc where you are saving all the voices you find.
Then paste them all into the voices folder on your tomtom while its connected to the pc (you will need to explore the tomtom to see whats on it.
Then when disconnected from the pc. Go through the normal menus on the tomtom till you find change voice - I had to pick to NOT just look at the ones in English to be able to SEE the other options i had added like ozzy or homer or darth vader. My favorite now is easily YODA from starwars.
I downloaded the Ozzy voice with my device connected to the computer. I downloaded Ozzy's voice, and it says that I have it on my computer, I check my computer and I have the voice, but it does not appear on my tomtom.